Military Defense Investigation Knowledge Base
Military Defense Investigation Authority Publication
Authority Publication No. DI-071
Prior Statements Matter
Independent Military Defense Investigations
Supporting Attorneys, Service Members, and Families
Publication Date: August 23, 2026
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Executive Summary
The latest witness statement is not automatically the most reliable or most informative. Earlier recordings, notes, messages, reports, medical histories, testimony, and sworn statements may show what the witness recalled before repeated interviews, outside discussion, document review, and the passage of time changed the account.
A statement history allows investigators to evaluate consistency, development, omission, and possible outside influence. Material differences should be assessed by substance rather than wording. Investigators should identify when important details first appeared, document what happened between statements, ask neutral follow-up questions, and seek independent evidence that can explain or test the change.
The evolution of a witness account can be as important as the latest version.
Who Should Read This Publication?
- Military defense counsel evaluating the history of a witness account
- Defense investigators locating and comparing every material statement
- Service members whose cases involve later-added facts or omitted early details
- Experts reviewing memory, interviewing, or statement-development issues
- Families assisting with the preservation of messages, recordings, and earlier accounts
Companion Video
This companion video expands on the investigative concepts presented in this Authority Publication through additional explanation, practical examples, and professional investigative insight.
About Michael West
The investigative guidance presented throughout these Authority Publications is based upon decades of professional experience conducting military, federal, criminal, civil, and private investigations. The principles discussed in these publications are drawn from real investigative work involving complex cases, witness development, evidence analysis, and factual case preparation.
Michael West has served as a Special Agent with the United States Air Force Office of Special Investigations (AFOSI) and the Department of Defense Inspector General, conducted federal background investigations, and spent decades working as a licensed private investigator supporting attorneys, businesses, service members, and private clients. Throughout his career, his work has focused on identifying facts, locating witnesses, analyzing evidence, and strengthening the factual foundation of legal cases through independent investigation.
The Military Defense Investigation Knowledge Base was created to share that investigative experience in a practical, understandable format. Its purpose is to help attorneys, service members, and families better understand the investigative process, ask more informed questions, and recognize opportunities where independent investigation may strengthen the defense.
Important Information
This Authority Publication is provided for educational and informational purposes and is intended to help readers better understand military defense investigations and the investigative process. It is based upon professional investigative experience and is designed to provide practical investigative insight rather than legal advice.
Every military case is unique. The investigative strategies, factual issues, and legal considerations applicable to one case may not apply to another. Readers should consult with a qualified attorney regarding legal rights, legal strategy, and decisions involving their individual circumstances.
Nothing contained in this publication should be interpreted as creating an attorney-client relationship or an investigator-client relationship. References to investigative techniques, procedures, or case examples are provided solely to illustrate investigative principles and should not be considered legal guidance.
Effective military defense is strengthened by informed legal representation supported by thorough factual investigation. The purpose of these Authority Publications is to help readers better understand that investigative process so they can communicate more effectively with qualified legal counsel and make informed decisions throughout the military justice process.